The word used in the German text is
Gleichsam = so to speak, or as it were.
In the English dictionary, .
(definition of 'so to speak' = so to speak to draw attention to the fact that you are describing or referring to something in a way that may be amusing or unusual rather than completely accurate)
So there are potentially three pieces of information; firstly, is that there needs to be more than four mechanisms; secondly, there is a portion at least of the scissor mechanism involved, and thirdly, he tells us that we need to add more crossbars, weights, pulleys and cord.